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Warranty - Schedule of Company's Warranty Accruals (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Product Warranty Liability [Line Items]
Acquisition balance relates to a pre-acquisition settlement agreement		$ 174
Pre-acquisition Settlement Agreement for Specific Performance [Member]
Product Warranty Liability [Line Items]
Acquisition balance relates to a pre-acquisition settlement agreement	$ 127	$ 127

X

- Definition

Amount of increase in the standard and extended product warranty accrual from a business acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249

+ Details

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Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: